Kenwood TS-140S Instruction Manual page 19

4-3. TRANSMITTER OPERATION
Preset the controls as shown in the accompanying il-
lustration.
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4-3-1. Precaution
Before transmitting check the frequency for activity
so that you do not interrupt another QSO.
4-3-2. SSB (LSB, USB) Mode
1. Place the POWER switch ON.
2. Set the MODE keys to USB or LSB. By interna-
tional convention frequencies below 10 MHz
utilize the LSB (Lower Sideband) mode, and fre-
quencies above 10 MHz use USB (Upper Side-
band). The actual switchover point on the TS-
140S/680S is 9.5 MHz. The TS-140S/680S will
select the proper mode when you tune to the
desired frequency. You can override this by simp-
ly pressing the desired mode key.
3. Press the microphone PTT switch, or set the
standby switch to SEND. The ON AIR indicator
will light.
4. Set the PWR control to the desired level.
5. Speak into the microphone and adjust the MIC
gain control so that the meter deflection does not
exceed the ALC zone on voice peaks.
Note:
Adjustment using the ALC meter provides greater
accuracy than if you try and use the power meter for
adjustment. Never adjust for ALC deflection above
the ALC zone, as this will cause distortion of the
transmitted audio signal.
ALC zone
Notes:
1. Do not exceed the ALC zone on voice peaks.
2.When using high gain microphones or pre-
amplified microphones you might have difficulty
in obtaining proper ALC meter readings, or you
might receive reports of audio distortion. To pre-
vent this type of problem you should set the front
panel MIC gain control to center and reduce the
gain of the internal microphone gain control, by
rotating the control clockwise, until the proper
ALC reading is obtained. The adjustment of this
control is described in Section 6-6-6.
6. Turn on the PROC switch if required. (Please refer
to Section 4-3-6)
7.Release the PTT switch, or place the standby
switch to REC. The ON AIR indicator will turn
OFF.
4-3-3. FM Mode
1. Place the POWER switch ON.
2. Select the desired frequency within the 28 MHz/
50 MHz amateur radio band. (50 MHz : TS-680S
only) Place the MODE key to FM.
3. Press the microphone PTT switch or place the
standby switch to SEND. The ON AIR indicator
will light.
4. Set the PWR control to the desired level.
19